MattairTech MT--D21E, User Manual

Page: 14 / 39

MT-D21E User Guide
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Wire: allow scanning bus via beginTransmission­endTransmission
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USB Device: big refactoring and bug fix
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USB Device: added PluggableUSB interface
Summary
Feature MT-D21E MT-D11
Microcontroller ATSAMD21ExxA, 32­Bit ARM Cortex M0+ ATSAMD11D14AM, 32­Bit ARM
Cortex M0+
Clock Speed 48 MHz 48 MHz
Flash Memory
256 KB (D21E18A) / 128 KB (D21E17A) /
64 KB (D21E16A) / 32 KB (D21E15A) 16 KB (4KB used by USB SAM­
BA bootloader)
SRAM
32 KB (D21E18A) / 16 KB (D21E17A) / 8
KB (D21E16A) / 4 KB (D21E15A)
4 KB
EEPROM
None (emulation may be available in the
future) None (emulation may be available
in the future)
Digital Pins 22 17
Analog Input Pins 10, 12­bit ADC channels 10, 12­bit ADC channels
Analog Output Pins 1, 10­bit DAC 1, 10­bit DAC
PWM Output Pins 12 8
External Interrupts 15 (1 NMI) 9 (1 NMI)
USB Device and Host (CDC and HID) Device and Host (CDC and HID)
UART (Serial) 2 1
SPI 1 1
I2C (TWI) 1 1
Operating Voltage
3.3V (Do not connect voltages higher than
3.3V!)
3.3V (Do not connect voltages
higher than 3.3V!)
DC Current per I/O
Pin
7 mA 7 mA
July 11, 2016 14 http://www.mattairtech.com/